[ServiceWorker] Add contentType argument to BodyStreamBuffer::readAllAndCreateBlobHandle.

Source/modules/serviceworkers/BodyStreamBuffer.cpp

Index: Source/modules/serviceworkers/BodyStreamBuffer.cpp
diff --git a/Source/modules/serviceworkers/BodyStreamBuffer.cpp b/Source/modules/serviceworkers/BodyStreamBuffer.cpp
index 9f34fd495a6aca94af76df37ecddb52cdb439fee..5ac35a948c534750a4c765ca4ab3b482c32bb2b9 100644
--- a/Source/modules/serviceworkers/BodyStreamBuffer.cpp
+++ b/Source/modules/serviceworkers/BodyStreamBuffer.cpp
@@ -13,11 +13,12 @@ namespace {
 
 class BlobCreator final : public BodyStreamBuffer::Observer {
 public:
-    BlobCreator(BodyStreamBuffer* buffer, BodyStreamBuffer::BlobHandleCreatorClient* client)
+    BlobCreator(BodyStreamBuffer* buffer, const String& contentType, BodyStreamBuffer::BlobHandleCreatorClient* client)
         : m_buffer(buffer)
         , m_client(client)
         , m_blobData(BlobData::create())
     {
+        m_blobData->setContentType(contentType);
     }
     ~BlobCreator() override { }
     void trace(Visitor* visitor) override
@@ -112,7 +113,7 @@ bool BodyStreamBuffer::readAllAndCreateBlobHandle(BlobHandleCreatorClient* clien
 {
     if (m_observer)
         return false;
-    BlobCreator* blobCreator = new BlobCreator(this, client);
+    BlobCreator* blobCreator = new BlobCreator(this, m_contentType, client);
     blobCreator->start();
     return true;
 }
@@ -137,8 +138,9 @@ void BodyStreamBuffer::trace(Visitor* visitor)
     visitor->trace(m_observer);
 }
 
-BodyStreamBuffer::BodyStreamBuffer()
-    : m_isClosed(false)
+BodyStreamBuffer::BodyStreamBuffer(const String& contentType)
+    : m_contentType(contentType)
+    , m_isClosed(false)
 {
 }